發(fā)布時(shí)間：2018-01-07 10:32

  本文關(guān)鍵詞：基于PSR技術(shù)的高效率電動(dòng)汽車輔助電源設(shè)計(jì)　出處：《重慶郵電大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 電動(dòng)汽車 輔助DC/DC電源 反激 效率 PSR精確采樣算法

【摘要】：隨著能源的大量消耗和大氣污染問題的日益嚴(yán)重,汽車行業(yè)的發(fā)展方向也開始轉(zhuǎn)向以電動(dòng)汽車等為代表的新型高節(jié)能高環(huán)保交通工具。電源系統(tǒng)作為電動(dòng)汽車的重要設(shè)備,主要由動(dòng)力電池和低壓蓄電池組成,其中動(dòng)力電池是電動(dòng)機(jī)的動(dòng)力來源,同時(shí)還可以通過一定的方式對(duì)汽車制動(dòng)產(chǎn)生的能量進(jìn)行回收,低壓蓄電池則是為汽車照明、儀表等低壓車載用電器供能,而車載輔助DC/DC電源就是連接這兩個(gè)部分的橋梁。為了適應(yīng)惡劣的車載工況,本文將以電動(dòng)汽車輔助電源在效率、精度、體積、穩(wěn)定性等方面的性能指標(biāo)為研究對(duì)象開展相關(guān)研究工作。首先,本文介紹了電動(dòng)汽車車載電源的研究現(xiàn)狀,針對(duì)輔助DC/DC電源12V和5V的輸出應(yīng)用場(chǎng)合,通過對(duì)比選擇多路輸出反激電路為主拓?fù)溥M(jìn)行研究,并對(duì)其兩種反饋控制方式分別進(jìn)行討論,確定DCM模式下的電流控制為本文的反饋控制策略,同時(shí)簡(jiǎn)單介紹了原邊反饋和副邊反饋原理。為了達(dá)到精確控制電路的目的,建立了小信號(hào)等效模型,得到電路的傳遞函數(shù)。其次,本文針對(duì)電動(dòng)車工作環(huán)境的限制,在分析所選拓?fù)涞幕A(chǔ)上,通過研究整個(gè)電源系統(tǒng)結(jié)構(gòu),將其劃分為各個(gè)不同的功能單元,然后分別從各個(gè)單元的參數(shù)設(shè)計(jì)入手,在硬件方面對(duì)變換器的效率進(jìn)行改進(jìn)優(yōu)化。然后,本文通過引入新型的原邊采樣算法對(duì)副邊反饋回路進(jìn)行改進(jìn),在去掉了部分不穩(wěn)定元件的同時(shí)還克服了傳統(tǒng)原邊反饋精度不高等自身缺陷,使得系統(tǒng)在實(shí)現(xiàn)小型化的同時(shí)還提高了穩(wěn)定性和效率。在算法理論研究基礎(chǔ)上,完成了系統(tǒng)的軟件設(shè)計(jì),主要包括PID控制算法設(shè)計(jì)、PSR精確采樣算法設(shè)計(jì)、系統(tǒng)主程序流程設(shè)計(jì)以及中斷子程序流程設(shè)計(jì)等。最后,本文利用Saber、MathCAD以及Simulink分別建立了電動(dòng)汽車輔助DC/DC電源各部分的仿真模型,并完成實(shí)驗(yàn)平臺(tái)搭建及仿真測(cè)試。仿真結(jié)果證明,多路反激DC/DC變換器能夠?qū)崿F(xiàn)穩(wěn)定的直流輸出。最后對(duì)設(shè)計(jì)的輔助電源樣機(jī)進(jìn)行工作性能測(cè)試,其效率較高能達(dá)到90%左右,并且在電壓紋波與控制精度上均能滿足設(shè)計(jì)要求,說明功率電路與控制電路設(shè)計(jì)基本正確,系統(tǒng)工作正常穩(wěn)定。
[Abstract]:With the large consumption of energy and the problem of air pollution is becoming more and more serious. The development direction of automobile industry also began to shift to the new high energy saving and high environmental protection vehicle represented by electric vehicles. As an important equipment of electric vehicles, power supply system is mainly composed of power battery and low voltage battery. The power battery is the power source of the motor, at the same time, it can recover the energy generated by the automobile brake in a certain way, and the low-voltage battery is the energy supply for the low-voltage vehicle electric appliances such as the automobile lighting, the instrument and so on. The vehicle-borne auxiliary DC/DC power supply is the bridge connecting these two parts. In order to adapt to the bad vehicle conditions, this paper will use the electric vehicle auxiliary power supply in efficiency, precision, volume. Stability and other performance indicators for the research object to carry out related research work. First, this paper introduces the status quo of electric vehicle on-board power supply research. In view of the application of 12V and 5V output of auxiliary DC/DC power supply, the main topology of multi-output flyback circuit is studied, and the two feedback control methods are discussed respectively. The current control in DCM mode is determined as the feedback control strategy in this paper, and the principle of primary and secondary feedback is briefly introduced. In order to achieve the purpose of accurate control circuit, a small signal equivalent model is established. The transfer function of the circuit is obtained. Secondly, according to the limitations of the working environment of electric vehicles, this paper analyzes the selected topology, through the study of the entire power system structure, it is divided into different functional units. Then, starting with the parameter design of each unit, the efficiency of the converter is improved and optimized in hardware. Then, this paper introduces a new algorithm to improve the secondary feedback loop by introducing a new original edge sampling algorithm. It not only removes some unstable elements, but also overcomes the shortcomings of the traditional original edge feedback, such as low precision, which makes the system achieve miniaturization and improve the stability and efficiency. On the basis of the theoretical research of the algorithm. Completed the software design of the system, including PID control algorithm design, PID precise sampling algorithm design, system main program flow design and interrupt subroutine flow design. Finally. In this paper, the simulation models of various parts of the auxiliary DC/DC power supply for electric vehicles are established by using Saberne MathCAD and Simulink, respectively. The simulation results show that the multi-channel flyback DC/DC converter can achieve stable DC output. Finally, the performance of the designed auxiliary power supply prototype is tested. Its high efficiency can reach about 90%, and it can meet the design requirements in voltage ripple and control precision. It shows that the design of power circuit and control circuit is basically correct, and the system works normally and stably.
【學(xué)位授予單位】：重慶郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U469.72

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 蔡源;王蘊(yùn)_";湯立新;李玉龍;尚維來;;低碳背景下電動(dòng)汽車產(chǎn)業(yè)分析[J];汽車工業(yè)研究;2014年12期

2 王丹;續(xù)丹;曹秉剛;;電動(dòng)汽車關(guān)鍵技術(shù)發(fā)展綜述[J];中國(guó)工程科學(xué);2013年01期

3 Gianni Vitale;Antonino Bruno;Nunzio Abbate;Gianfranco Di Marco;;電力轉(zhuǎn)換器可大幅提升新能源汽車電池效率[J];中國(guó)電子商情(基礎(chǔ)電子);2012年06期

4 劉春娜;;電動(dòng)汽車電池應(yīng)用與展望[J];電源技術(shù);2011年01期

5 孟建輝;劉文生;;反激式變換器DCM與CCM模式的分析與比較[J];通信電源技術(shù);2010年06期

6 夏德建;;電動(dòng)汽車研究綜述[J];能源技術(shù)經(jīng)濟(jì);2010年07期

7 崔玉峰;楊晴;張林山;王駿;;國(guó)內(nèi)外電動(dòng)汽車發(fā)展現(xiàn)狀及充電技術(shù)研究[J];云南電力技術(shù);2010年02期

8 黃會(huì)雄;袁力輝;王成;;電動(dòng)汽車隔離型DC/DC輔助電源模塊的可靠性設(shè)計(jì)[J];電子質(zhì)量;2008年06期

9 聶昕;毛永志;;電動(dòng)汽車的關(guān)鍵技術(shù)及發(fā)展[J];新材料產(chǎn)業(yè);2006年10期

10 李秀芬;雷躍峰;;電動(dòng)汽車關(guān)鍵技術(shù)發(fā)展綜述[J];上海汽車;2006年01期

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